making it compile on windoze again
making it compile on windoze again

- pthread_t on windows pthreads has changed the pthread_t type into a struct
  so our MT_ID / pthread_t hack is a mess

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb